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Perissopyge (Trilobita) from the lower Cambrian (Series 2, Stage 4) of North America and Greenland
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
2008 (English)In: GFF, ISSN 1103-5897, E-ISSN 2000-0863, Vol. 130, no 2, 71-78 p.Article in journal (Refereed) Published
Abstract [en]

The distinctive trilobite Perissopyge phenax was originally described from the Henson Gletscher Formation (Cambrian Series 2, Stage 4) of central North Greenland and reported from the Sekwi Formation of Yukon Territory, Canada. This latter material is illustrated herein for the first time. Perissopyge phenax is also currently described from the Paralleldal Formation of Peary Land, North Greenland, some 100 km east of the type locality, where overlying strata correlate with the middle–upper Toyonian Stage of Siberia (Cambrian Stage 4). Perissopyge triangulata, from the Harkless Formation (Cambrian Stage 4) of Nevada, is also discussed and tectonic deformation of the type suite is recognized. An indeterminate species of Perissopyge is identified in the Ella Island Formation of North-East Greenland. The Ella Island Formation yields Olenellus hanseni, which is possibly synonymous with O. cf. truemani from the Henson Gletscher Formation. Together, these occurrences enhance stratigraphical correlation between central North Greenland and North-East Greenland and suggest some utility for Perissopyge in correlation of the lower half of the Laurentian Cambrian.

Place, publisher, year, edition, pages
2008. Vol. 130, no 2, 71-78 p.
Keyword [en]
Perissopyge, Cambrian, stratigraphy, Greenland, North America
National Category
Earth and Related Environmental Sciences
Identifiers
URN: urn:nbn:se:uu:diva-97594ISI: 000258457500002OAI: oai:DiVA.org:uu-97594DiVA: diva2:172599
Available from: 2008-09-29 Created: 2008-09-29 Last updated: 2017-12-14Bibliographically approved
In thesis
1. Evolution and taxonomy of Cambrian arthropods from Greenland and Sweden
Open this publication in new window or tab >>Evolution and taxonomy of Cambrian arthropods from Greenland and Sweden
2008 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

Arthropods have a rich fossil record spanning the Phanerozoic. Biomineralized forms such as the extinct trilobites are particularly common and are proven index fossils for biostratigraphy. Forms with an unmineralized cuticle are more rare, preserved only in so called konservat lagerstätten. Cambrian strata of Greenland have yielded rich trilobite faunas with potential for intercontinental correlation of Cambrian strata, but also an exceptionally preserved fauna, the Sirius Passet Lagerstätte. The first part of this thesis is concerned with trilobite biotratigraphy of the provisional Cambrian Series 2 in Greenland. The second part is concerned with exceptionally preserved arthropods from the Sirius Passet Lagerstätte, but also from 'Orsten' deposits from the Cambrian of Sweden.

Perissopyge phenax occurs in the Henson Gletscher and Paralleldal formations spanning the Series 2 and 3 boundary interval in North Greenland. It also occurs in the Sekwi Formation of Yukon Territory, demonstrating that the species may hold potential for correlation within Laurentia. An indeterminate species of Perissopyge is shown to occur in the Ella Island Formation of North-East Greenland together with Olenellus cf. hanseni, which is similar to Olenellus cf. truemani described from the Henson Gletscher Formation. If this correlation is further corroborated it would offer a first tie-point for the An t'Sron Formation of North-West Scotland which yields Fritzolenellus lapworthi, herein reported for the first time from the Bastion Formation which underlies the Ella Island Formation.

Oelandocaris oelandica from ‘Orsten’ deposits in the Cambrian series 3 and 4 boundary interval in Sweden is an early representative of the Crustacean stem lineage. Kiisortoqia avannaarsuensis is a new arthropod from the Sirius Passet Lagerstätte with robust antennulae strikingly similar to the 'raptorial' limb of the problematic anomalocaridids. The ventral morphology of the 'bivalved' Isoxys volucris is described for the first time and compared with other species assigned to Isoxys from Cambrian lagerstätten around the world. Finally, Siriocaris trolla, is a new arthropod that similarities with trilobites and certain ‘trilobitomorphs’ but seems to lack important synapomorphies of these taxa, though this may be due to preservational limitations in the material at hand.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2008. 35 p.
Series
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 558
Keyword
Cambrian, Arthropods, Trilobites, Evolution, Greenland, Sweden
National Category
Geology
Identifiers
urn:nbn:se:uu:diva-9301 (URN)978-91-554-7302-0 (ISBN)
Public defence
2008-10-31, the lecture theatre, Museum of Evolution (Palaeontology), Norbyvägen 22, 75236 Uppsala, 10:00
Opponent
Supervisors
Available from: 2008-09-29 Created: 2008-09-29 Last updated: 2011-01-12Bibliographically approved

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